Mold for building-blocks.



W. N. BOX &. H. BROWN.

MOLD POR BUILDING BLOCKS.

Patentd Feb. 2, 1909.

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WQN. BOX. & H. BROWN.

MOLD FOB. BUILDING BLOCKS. APILIUATION FILED PEB. 9, 1.905. EENEWED JAN. 18,1908.

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@fr/nues W. N. BOX & H. BROWN. MOLD FOR BUILDING. BLOCKS. APPLIOATIONIHLBD P219, 1905. BENEWBD JAN.1s,19oa.

91 1,'1 10. l y Patented Feb. 2, 1909.

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W. N. BOX & E'. BROWN.v

MOLD FOB. BUILDING BLOUKS. APPLIOATION FILED ma.A 9, 1905. Bmmwnn 31m18.190s.

A06 aaa/7 h//r UMTED STA- riss PATENT OFFICE.

o WILLIAM N. BOX, OF NORTHFIELD, AND'HAUGHION BROW N, OF MINNEAPOLIS, MINNESOTA,

ASSIGNORS TO NELS .I BLOMGREN, OFM'INNEAPOLIS, MINNESOTA.

MOLD FIOR BUILDINGBLOGK Specification of Letters Patent. l

Patented Feb. 2, 1909.

Application med February e, 19o5,'seria1 No. 244,367. Renewed Jenaer-y 18,1908. serial No. 411,499.y

@To all'whom it may concern:

Beit known that we, WILLIAM N. Box, of

Northfield, Brown county, Minnesota, andcan be easilyy and quicklyv molded.

' A further object is to provide a mold parl ticularly adapted forforming a, block `commeans fortiltingthe side and end walls of the'l i mold outwardly to posed of sections separated by an-air space and connected across such space by a nonconductingl material such as wood.

A further Objectis to provide improved expose the'c'ompleted block. I' V i from the fo lowing detailed description.

The invention consists generally in various constructions and combinations, all as hereinafterl described and particularly pointed out the claims.

In the accompanying drawings forming part of this speciication, Figure' 1 isa plan view of a building block mold emb'od ing oui` invention. Fig. 2 is a plan view o the mold looking at the under side. Fig. 3 is a lon 'tudinal vertical section showing the mo d closed 'and ready for use. Fig'. 4 is a similar view showing the walls tilted out# wardly to allow the convenient. removal of a block. Fig. 5'is a transverse vertical section through the mold and the' block :therein:

Fig. 6 is a similar view showing the walls tilted away from the block and illustrating the position of the connectin means' between the sections. Fig. 7 is a etail view of the connection betweenI the side and en d walls ofthe mold. j 1

vIn the drawin 2 represents a suitable base or frame having egs 3 and centrali arranged bar 4 extending lengthwise of the ase, and a strengtheningcross-bar or brace 5 connecting Y the bar 4 near the middle of the machine wit l the side rails. These rails and 'bars form askeleton base or frame to .receive amovabla oor u on which the block is molded. l This oor is ivided lon itudinally into two sec, tions connected-at t e ends by straps 7 and` rovided with endy recesses 8 and .circular` try` cles 9 near the middleto receive the'cores,

' vas will hereinafter appear.

After the block has 4been molded an the walls` tilted outwardly from it, the floor, with the bl'ck thereonfis removed from the mold b means of suitable tools. Pivoted upon ea vside of 4 the bar 4 are vertically arranged plates 10 extending fromend to end of the mold -and separating one side from the other and provi ed'with'semi-circular cores l1 arranged'in pairs and adapted to enter 'the holes 9 1nxthe v.floor and form the centralI cores for the block.

These plates and cores are preferably made from castings las describe m,old,if necessary, are intended to be permanently fixed thereon, only to be taken ofi in case` of breakage ordpreparatoryt0 shippingl or packing the mol The plates are separated from@ one-another a dlstance e ual to l v the width'of the bar 4, as shown .in igs'. 5 Other bb'ects of the invention will appear' and 6, and when adjusted pre aratory to molding the block will cause t e jririrmation of an air s ace therein extending from the top 'tothe ottoni.` This manner ,of mounting the cores in .the mold permits their expansion. preparatory tov filling the mold and their contraction 'after the block is formed to-facilitate its removal. moved either at the bottom ortop of the mold, but we have found that b arrangin the cores in the manner describe that muc blocks and particularly where an air space is forme between the inner and outer sections. We ytherefore.-regard the expanding and con- Atractin features of our` cores as an lmportant part edges of the lates 10'and hold them apart provided wit a strap 13 en its upper ed e that is hinged 'at `14 to oneV of the end wa ls engage the other end wall, an thereby aid in holding the walls alinement during the op leration of moldin".

swlung, oir its ivlot'tol uncover the airspace centrallyl arranged onj-their inner and and revent t e cement and sand fromentef-j ing't e air s ace, and this bar is preferably 'l' hin ed on the frame of the mold 4 -an while removable from the Ordinarily, the cores' are -e-v less labor isinvolved in the formation of the our invention. A bar 12 is adapted to .drop into the space between the upper 15, and isprovided with a sna or catch 16 to When it is `desired toV tilt Ithewallsl Vout-f M 'Pdlyuand'removelthe block, the Ybar 1'2`tfisj Y between' thel lock sections and' permit the end l walls te beseparated' The end wallslj have'brackets18- at their lower ends p'iv'otedfI g on theY base', vand are provided with cereale" ada ted to overhang the recesses in the ends of t e floor 6 when the mold is being set up preparatory to use. 'lhe plates 10 are also provided on each side or" the cores 11 with vertical slots 20, wherein wooden pins or bars 21 are laid extending across the air space and tying the block sections together. 'l he ends of the pins or bars preferably extend out to the surface of the block on each side to form nailing surfaces for furring strips, or interior or exterior finish. 'lhese bars or pins are preferably dipped in a preparation of tar before being placed in the mold to prevent them from being affected by the moisture in the green block and swelling or cracking and damaging the block. 'lhe end walls preferably project beyond the sides of the machine to adapt the mold for forming blocks of different size and are pivotally connected near their upper ends by rods 22 with blocks 23 that are slidable on rods 24 horizontally arranged inthe base of the machine substantially in line with the bar 4. 'lhese blocks slide freely back and forth `on the rods and permit the quick and convenient adjustment of the end walls. A bar 25 is centrally pivoted on the bar 4 on the under side of the machine, and has its ends connected by rods 26 with the block 23, suitable turn-buckles 27 being provided to ermit convenient adjustment of the said locks. An operating ever 28 is mounted on the bar 25 and adapted to be swung back and forth lengthwise of the machine to swingthe end walls in and out to close or open the mold. 'lhe side walls 29 are provided at their lower edges with brackets corresponding to those on the end walls, pivoted on lugs 3() which extend horizontally from the side rails of the machine frame, and

have a series of holes32 to permit the adjustment` of the side walls toward or from each other to increase or decrease the'width of the block. 'l he ends of these lugs are substantially7 Hush with the projecting ends of the end walls,and curved pins 33 are provided on said side walls to enter holes 34 in the end walls to cause acorresponding movelment of the side walls when the end walls are operated. 'lhe pins 33 are inserted into the proper hole in the end walls according to the pivotal position ofthe sidewalls on their lugs and the width of the block to be formed.

In o eration the removable floor is placed on the ase and the walls of the mold closed. The bar 12 is then inserted into the space between the upper edges of the plates 10 forcing them apart and causing them to `assume a vertical position with an air space between them, and the wooden bars 21 having been previously laced in position the operator lls the mo d with the material from which the block is to be formed and tamps it firmly therein. The bar 12 is then lifted and tilted over to one end of the machine, the side and end walls are swung outwardly away from the block, and the floor and block thereon, in a green state, are lifted and moved away to a suitable place to dry. Another iloor is tiren put into the mold and the operation described repeated.

Whenever desired the osition ol the side walls on their supporting ugs can be changed to vary the width of the block, and a eorre spending floor used to accommodate the diiference in the width of the space between the walls.

Ve claim as our invention:

1. The combination, with a suitable base, of side-and end walls hinged thereon, rods supported at one end in the ends o l said base and extending horizontally therefrom, blocks slidably mounted on said rods, rods pivotally connecting said blocks with said end walls, and mechanism for moving said blocks.

2. The combination, with a base, of side and end walls hinged thereon, guides mounted on said base, blocks slidably supported on said guides and having a pivotal connection with said end walls, means connecting said side and end walls to operate the former simultaneously with the movement of the latter, and mechanism for operating said blocks.

3. The combination, with a base, of side and end walls hinged thereon, curved rods carried by said side walls and having a sliding connection with said end walls, andamechanism for tiltinfr said end walls.

4. In a building block mold, the combinav tion, with abase and the side and end walls, of core'plates hinged on said base and dividing the mold Ainto independent compartments or chambers, a space being provided between said plates to form an air space between the sections of the block and said lates having recesses to receive transverse bridging pins, substantially as described.

5. The combination, in a building block mold, with a base, of side and end walls mounted thereon, core lates mounted on said base and dividing t 1e mold into chambers or compartments, said )lates being provided with cores semicircu ar in cross sectionarranged in pairs, and aspace being provided between said plates, and said lates having slots or recesses to receive bridging pins or bars transversely arranged in the mold, substantially as described.

6. The combination, in a building block mold, with a frame provided with side and end walls thereon, oi' core plates hinged 011 said frame with a space between them and extending lengthwise of the mold from end to end and from top to bottom thereol',said plates having slots to receive transverse ridging pins, and means separating the upper edges of said plates, substantially as described.

7. The combination, in a building block mold, with a frame rovided with side and end walls, of core p ates arranged on said frame and dividing the interior of the mold into independent compartments',` said Vplates. having va'space between them, and' a bar hin ed to one of said end walls andndapted to c ose the opening between said lates at i the top of. the mold,l and said'bar aving a said base and dividing the mold longitudi-- nally, into independentV compartments, a-

catch to engage the other end wall and there-y by hold them in i .proper alinement, substantially as described. 1

8. The combination, in a building. bloclr mold, with a frame provided on each sideA with laterall extendlng lugs. each havingl a series of hoes or perforations, vend walls hinged -at their lower edges-tol the ends of said 'frame and projecting on eachside be- .yond the base to a pointgopposite the 'outer L erforations in said lu s," and side walls lhingedon said lugs an adjustable in the holes therein to increase or decrease the width ofk the mold, y"and a removable floor. adapted to close the space 'between said side walls at the bottom oi the mol'd.-v

9. In a building block mold, the combination, with a base and .the-side and end walls .mounted thereon, of 'core plates arranged on space bein .provided between said plates, means for c osin said space at the top ofmthe mold, and said p ates having slots or recesses wherein connecting bars or rods are placed.

and embedded in the block to tie the sections together, substantially as described.

10. In a building block mold, the combination, with a base, of side walls hinged thereon, curved rodsv carried by said slde walls, end walls also hinged on said base and having.

holes to receive said curved rods,'said rods causing movement 'ot said side Walls when said end walls are operated, .and mechanism for operating said end walls. 4 11. The combination, in a building mold, -with a suitable frame or base, otside and end walls hinged thereon, said end walls, being provided with 'centrally arranged cores, a removable floor arranged upon said base and having `recesses 1n lts ends, core plates mounted on said base near the mlddle4 thereof and dividing the mold in to `separate compartments, an air space being provided between said plates, and said plates having slots extendingfrom vtheir upper edge toward the.bottom to receive transversely arranged bars thatl bridge the' space between .said

ff plates, substantially as described.- 12. In a building block mold, a coreV capable of expansion preparatory to lling themold and forming the block and 'ofconf tractionto facilitate the removal of the completed block, and means hinged at one endandhavingfa vertical swinging movement on Vitspivot for expandingthe core at the top of the mold.

13. alf-gilding block mold having c'rel plates and core sections mounted thereon,l

core plates, core sections carried thereby, an air space being provided between thev Iblock sections, su stantially as described.

block' described.

a s i ace being provided between'said plates,

an said plates being movable toward or from each other to allow separation of said core sections preparatory to filling the mold and to allow them to be drawn together to facilitate the removal of the completedl block, substantially "as described.

. y14. r11-@building block mold, the com 5 bination,y with the side and end walls, ofI a. core capable ot expansion preparatory -to -lling the mold andoi". contraction to facili# tate the removal of the completed block,` i and means at the vtop ofthe mold for ex anding the core and locking' the end Wal s together, substantially as described.

suo

15. In a mold, the combination,` with Vthe side and end walls and base, of a core composed of separable sections arranged to be" substantially to the corresponding sections of the other plate, and said plates being movable toward or from each other to vary the distance between the opposite core sections, substantially as described.

17.. The combination, in a mold, with a suitable base and the side and end Walls, of

plates and sections separating the -mold,

and said platesl having openings or recesses to recelve abrid mg means connecting the 18.y Inl abuildingvblock mold, the combination, with a base and the side and end. walls, of cores composed of movable sections and arranged to divide said mold intol com-- partments, an air space bein' formed be# tween the core sections when t e mold is in use, and s aid core 'sections having recesses wherein transversely arranged bars may be pla'ced'toiibridg'e said air space andunite the sides of vthe block, substantially as 1 19.l In.a building block mold, vthe comy bination, with a base and the side and end walls, of cores mounted on said base and composed of Aseparable sections that are movable toward or from each other, and a bar provided "at the top of said mold for separating said core sections.

20. In' a'building block'mold, the combination with a base and the side Aand end walls, of .core plates movable toward or from Veach other,A and means arranged 'to be inserted between ythe edges of said plates from the outsideforv se arating them preparatory toiilling the mol gu.

' walls, of core plates capable of movement 21. In a building block mold, the oombination with the base and the side and end. Walls, of core plates movable on saidibase and ca able of movement toward or from each ot 1er to contract or expand the core, and means inserted between and engaging the' edges of said plates for separating them pre aratory to filling the mold, substantially as escribed.

22. In a building block mold,` the combination'with a base and the side and end toward or from each other to contract or` expand the core, a'nd bridging means extending transversely with respect to said plates, substantially as described.

other, an air space being provided between 20 the plates separatingy the mold sections, and bridging means for said space arranged transversely with respect to said plates, substantially as described.

In Witness whereof, We have hereunto set 25 our handsthis 4th day of February 1905.

WILLIAM N. BOX. HAUGH'ION BROWN.

Witnesses RICHARD PAUL, C. MACNAMARA. 

